safe to run a 1717 on 4S in a truggy? pics included

Ok,

I just got done with my Caster K8T conversion, which included stuffing a CC 1717 1580kv car motor into the chassis. I had to use an EliteRC motor mount from a MBX6 to get the proper motor clearance. With this mount I can run as low as a 15, maybe a 14t, pinion.

Now, I had ever intention of running the setup using a pair of 3S batteries in series so that I could acheive long enough run times to complete a 20 min main without needing to change batteries. I'll still likely do this, but for now, I have only 4S batteries, with the exception of a pair of 3S Zippy batteries that I only plan to use for testing until I can get some new batteries.

Would it be safe to run 4S in this setup? My 4S batteries are the Hyperion G3 25c 5000mah batteries. Or will the motor try to draw too much from them.

I'm currently geared 18/46. Here is how the speed calc pans out.

On 4SDifferential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 18
Total Voltage: 14.8
Motor KV: 1580
Tire Diameter (inches): 5.8
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.56 : 1
Total Ratio: 10.98889 : 1
Tire Circumference (inches): 18.22 inches (462.82 mm)
Rollout: 1.66:1
Total Motor Speed: 23384 RPM
Vehicle Speed: 36.72 mph (58.98 km/h)
Effective KV Value: 1580
KT constant: 0.86 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

On 6SDifferential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 18
Total Voltage: 22.2
Motor KV: 1580
Tire Diameter (inches): 5.8
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.56 : 1
Total Ratio: 10.98889 : 1
Tire Circumference (inches): 18.22 inches (462.82 mm)
Rollout: 1.66:1
Total Motor Speed: 35076 RPM
Vehicle Speed: 55.08 mph (88.47 km/h)
Effective KV Value: 1580
KT constant: 0.86 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

Now on 6S with a 15t pinionDifferential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 15
Total Voltage: 22.2
Motor KV: 1580
Tire Diameter (inches): 5.8
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 3.07 : 1
Total Ratio: 13.18667 : 1
Tire Circumference (inches): 18.22 inches (462.82 mm)
Rollout: 1.38:1
Total Motor Speed: 35076 RPM
Vehicle Speed: 45.9 mph (73.73 km/h)
Effective KV Value: 1580
KT constant: 0.86 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

It definately looks like the 15t on 6S puts the RPMs in the sweet spot. Again, that is where I plan to be eventually. But man, 45mph is still a bit fast for racing.

ben